CN112340463A - Anti-blocking conveying pipe structure for pneumatic conveying of viscous materials and anti-blocking method thereof - Google Patents
Anti-blocking conveying pipe structure for pneumatic conveying of viscous materials and anti-blocking method thereof Download PDFInfo
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- CN112340463A CN112340463A CN202011158993.7A CN202011158993A CN112340463A CN 112340463 A CN112340463 A CN 112340463A CN 202011158993 A CN202011158993 A CN 202011158993A CN 112340463 A CN112340463 A CN 112340463A
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- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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Abstract
The invention relates to an anti-blocking conveying pipe structure for viscous material pneumatic conveying and an anti-blocking method thereof. The invention has the following advantages: effectively solve the inner wall wearing and tearing and the jam of straight tube portion and elbow portion, guarantee the structural strength of conveyer pipe.
Description
The technical field is as follows:
the invention belongs to the field of pneumatic conveying, and particularly relates to an anti-blocking conveying pipe structure for pneumatic conveying of viscous materials and an anti-blocking method thereof.
Background art:
the pneumatic conveying system is also called as air flow conveying, which is a specific application of fluidization technology, and utilizes the energy of air flow to convey granular or powdery materials in a sealed pipeline along the air flow direction. In the pneumatic conveying process, factors influencing continuous material conveying, such as pipeline blockage and bent pipe damage, can occur, the pipeline blockage can seriously influence the material conveying, and the serious can cause explosion.
The viscous materials continuously rub the inner wall of the pipeline in the conveying process to generate electrostatic force, attract each other under the action of the electrostatic force and are condensed into blocks, the blocks can be generated in the straight pipe section and the bent pipe section of the conveying pipe structure, on the other hand, the materials have the adhesion property, the effect of the electrostatic force is more obvious in the conveying process of the viscous materials, and the blocking phenomenon of the viscous materials under the action of the electrostatic force and the centrifugal force is more serious in the bent pipe; secondly, the inner wall of the straight pipe section of the conveying pipe is mainly abraded due to friction between materials and the inner wall, and the abrasion of the bent pipe section is mainly impact abrasion of the materials to the inner wall of the bent pipe in the turning process, so that the straight pipe in the viscous material pneumatic conveying system is easy to block, and the bent pipe is seriously abraded and blocked.
At present, in order to solve the technical problems, an air blowing bypass pipe is additionally arranged on a conveying pipeline to improve the blocking situation, the air blowing bypass pipe is always in an air ventilation state as long as the conveying pipeline structure normally works, the air consumption is large, and the arrangement of the air blowing bypass pipe only aims at the situation that a straight pipe is blocked, so that the blocking and abrasion at a bent pipe cannot be effectively solved; patent No. 201920903255.7 a pneumatic conveying system's anti-clogging device adopts jet-propelled to prevent stifled and vibrate and prevent stifled mode that combines together to prevent blockking up the processing to pneumatic conveying pipe, but has following defect: 1. the conveying pipe is vibrated by knocking the outside of the conveying pipe, so that the blocked materials in the conveying pipe are evacuated, but the structure is only suitable for the straight pipe part, the blocking condition of viscous materials at the bent pipe cannot be effectively solved, and the blocking of the viscous materials at the bent pipe is often the most serious; 2. knocking the outer pipe of the conveying pipe easily causes the conveying pipe to generate local deformation or influences the structural strength of the conveying pipe, and the service life of the conveying pipe is greatly shortened.
Therefore, if a conveying pipe structure for pneumatic conveying of viscous materials is provided, which effectively solves the problems of abrasion of the inner walls of the straight pipe part and the bent pipe part and blockage, and a blockage prevention method thereof are certainly accepted and applied in the field of pneumatic conveying.
The invention content is as follows:
the invention aims to overcome the defects and provides an anti-blocking conveying pipe structure for pneumatic conveying of viscous materials and an anti-blocking method thereof, which effectively solve the problems of abrasion and blocking of the inner walls of a straight pipe part and a bent pipe part and ensure the structural strength of the conveying pipe.
The purpose of the invention is realized by the following technical scheme: an anti-blocking conveying pipe structure for pneumatic conveying of viscous materials comprises horizontal pipes and longitudinal pipes which are sequentially arranged at intervals, bent pipes are arranged between the horizontal pipes and the longitudinal pipes, the horizontal pipes, the longitudinal pipes and the bent pipes form conveying pipes in an integrated mode, the horizontal pipes, the longitudinal pipes and the bent pipes respectively comprise an aluminum alloy outer pipe body and a rubber inner pipe body, gaps are formed between the aluminum alloy outer pipe body and the rubber inner pipe body, the aluminum alloy outer pipe body and the rubber inner pipe body are connected through a plurality of sealing rings which are distributed at equal intervals, and the anti-blocking conveying pipe structure further comprises a controllable vibration blowing mechanism arranged along the extension direction of the conveying pipes;
the bent pipe comprises a horizontal part communicated with the corresponding horizontal pipe and a longitudinal part communicated with the corresponding longitudinal pipe, the horizontal part and the longitudinal part are smoothly transited to form a first arc surface, the outer side of the horizontal part is smoothly transited to form a hemispherical part outwards, and the hemispherical part is smoothly transited to form a second arc surface towards the outer side of the longitudinal part;
the controllable vibration blowing mechanism comprises a bending bypass pipe and a control unit, the bending bypass pipe is distributed along the extending direction of a horizontal pipe and a longitudinal pipe, a plurality of first blowing pipes which are uniformly distributed are arranged between the bending bypass pipe and the corresponding horizontal pipe and between the longitudinal pipes, the first blowing pipes are communicated with the inner rubber pipe body, one end of the bending bypass pipe is connected with an air source chamber, one end of the bending bypass pipe is provided with a pneumatic stop valve, the positions of the inner rubber pipe bodies of the horizontal pipe and the longitudinal pipe, which are close to the first blowing pipes, are provided with a first pressure sensor, each first blowing pipe is provided with a first one-way valve, the position of the bending bypass pipe, which is close to the bending, is provided with a vibration blowing unit, the vibration blowing unit is communicated with the air source chamber, the vibration blowing unit is connected with a bent pipe, and the air outlet end of the vibration blowing unit is aligned to a first arc surface, the control unit is electrically connected with the pneumatic stop valve, the first pressure sensor, the first one-way valve and the vibration blowing unit.
The invention is further improved in that: the vibration blowing unit comprises two second pressure sensors arranged in a rubber inner pipe body of the bent pipe and two second blowing pipes connected with the bent pipe, the second pressure sensors are respectively and correspondingly arranged at the side of an air outlet end of each second blowing pipe, the two second blowing pipes are jointly connected with a vibration group, the air outlet ends of the two second blowing pipes are in buffer type sealing connection with the rubber inner pipe body through sealing groups, the air outlet ends of the two second blowing pipes respectively correspond to a first arc surface and a second arc surface, and second check valves are arranged on the second blowing pipes.
The invention is further improved in that: the vibration group includes the vibration case with two second gas blow pipe fixed connection and runs through the pivot that the vibration case set up, the pivot is passed through the motor and is realized rotating, the both ends of pivot are connected with the carousel respectively, eccentric connection has the balancing weight on the carousel, still including the base of arranging the vibration case below in, first spring has between the outer body of aluminum alloy of vibration case and return bend, the vibration case is run through to the one end of second gas blow pipe, base and outside air supply room intercommunication, the second spring has between base and the vibration case, flexible section has on the second gas blow pipe, flexible section is located the upside position of the type of bending bypass pipe.
The invention is further improved in that: the sealing group comprises a shaft sleeve fixedly sleeved on one end of the second air blowing pipe, through holes for accommodating shaft sleeve embedding are formed in the aluminum alloy outer pipe body of the bent pipe and the rubber inner pipe body, a sealing buffer piece is embedded in the through holes of the aluminum alloy outer pipe body, the shaft sleeve is embedded in the sealing buffer piece, the two ends of the shaft sleeve protrude out of the sealing buffer piece, the rubber inner pipe body is in threaded sealing connection with one end of the shaft sleeve, the other end of the shaft sleeve is in threaded connection with a nut, and the nut is in end face contact with the sealing buffer.
The invention is further improved in that: the sealing buffer piece comprises a first protruding portion, a recessed portion and a second protruding portion, the first protruding portion is arranged between the outer aluminum alloy tube and the inner rubber tube, the recessed portion is embedded with the inner wall of the through hole of the outer aluminum alloy tube, and the second protruding portion is arranged at the outer side end of the outer aluminum alloy tube.
An anti-blocking method for an anti-blocking conveying pipe structure for pneumatic conveying of viscous materials comprises the following specific steps:
s1, the first pressure sensors detect the pressure value of the rubber inner pipe body in the horizontal pipe or the longitudinal pipe in real time, the detected pressure value is transmitted to the control unit, the control unit receives signals, analyzes and processes the signals, and compares the pressure values detected by the first pressure sensors with preset values set in the control unit;
a. if the pressure values detected by the plurality of first pressure sensors are all smaller than a preset value, the control unit sends out non-opening instruction information to the first one-way valve and the pneumatic stop valve;
b. if the pressure value detected by any first pressure sensor is larger than or equal to a preset value, the pressure value indicates that the position of the rubber inner pipe body in the horizontal pipe or the longitudinal pipe is blocked, the control unit sends opening instruction information to a first one-way valve on a first air blowing pipe close to the blocked position and a pneumatic stop valve, and the air source chamber blows air into the rubber inner pipe body from the first air blowing pipe so as to blow blocked materials;
s2, the second pressure sensors monitor the pressure value of the inner rubber pipe body in the elbow in real time, the detected pressure value is transmitted to the control unit, the control unit receives signals, analyzes and processes the signals, compares the pressure values detected by the two second pressure sensors with a lower threshold value and an upper threshold value set inside the control unit, the numerical value of the upper threshold value is larger than that of the lower threshold value, and the larger the numerical value of the threshold value is, the larger the blockage of the inner rubber pipe body in the elbow is;
a. if the pressure values detected by the two second pressure sensors are both smaller than or equal to the lower threshold value, the control unit sends out non-opening instruction information to the pneumatic stop valve, the two second one-way valves and the motor driving the rotating shaft to rotate;
b. if the pressure value with the larger value among the pressure values detected by the two second pressure sensors is between the upper threshold value and the lower threshold value set in the control unit, the control unit sends opening instruction information to the pneumatic stop valve and the two second one-way valves and sends non-opening instruction information to a motor driving the rotating shaft to rotate, and the air source chamber simultaneously blows air to the two second air blowing pipes into the rubber inner pipe body of the bent pipe, so that the blocked materials are blown away;
c. if the pressure value with the larger value among the pressure values detected by the two second pressure sensors is larger than or equal to the upper threshold value, the control unit sends opening instruction information to the pneumatic stop valve, the two second one-way valves and the motor driving the rotating shaft to rotate, so that the air source chamber blows air to the second air blowing pipe to the inner rubber pipe body, the inner rubber pipe body in the bent pipe is vibrated, and the blocking materials are quickly dredged under the two-way effect of vibration and blowing.
Compared with the prior art, the invention has the following advantages:
1. the structure of the conveying pipe is improved, and the controllable vibration blowing mechanism is arranged on the conveying pipe structure, so that the two pipes are arranged together, and the abrasion and the blockage of the straight pipe part and the bent pipe part are effectively avoided; the conveying pipe structure adopts a structural form that a rubber inner pipe body and an aluminum alloy outer pipe body are combined, the rubber inner pipe body effectively reduces the impact force and the corrosivity of conveying materials due to the wear resistance and the corrosion resistance of the rubber inner pipe body, and the inner wall of the conveying pipe structure is prevented from being abraded by the materials.
2. The rubber inner pipe body has a good buffering effect, and the blocking situation of the straight pipe of the rubber inner pipe body can be solved under the buffering floating effect of the rubber inner pipe body and the blowing effect of the controllable vibration blowing mechanism on the horizontal pipe and the longitudinal pipe of the conveying pipe structure; and adopt special structural style to the return bend, when the material from horizontal pipe or vertical pipe direct impact return bend department, the material produces the vortex and upwards flows along with the second arc surface at the hemisphere position of return bend department, certain water conservancy diversion effect has, alleviate the material because diversion and centrifugal force are to the impact force that the return bend inner wall produced, and even the material is piled up in the inner wall of first arc surface and the inner wall department of second arc surface, controllable formula vibration air blowing mechanism blows or blows and the dual function of vibration to first arc surface and second arc surface, thereby blow off fast the material of return bend department, this kind of vibration prevents that the jam mode can not lead to the fact the influence to the structural strength of conveyer pipe simultaneously.
Description of the drawings:
fig. 1 is a schematic structural diagram of an anti-clogging conveying pipe structure for pneumatic conveying of viscous materials.
Fig. 2 is a partial structural schematic view of an elbow of the anti-clogging conveying pipe structure for pneumatic conveying of viscous materials.
FIG. 3 is a schematic structural diagram of a controllable vibration blowing mechanism of an anti-clogging conveying pipe structure for pneumatic conveying of viscous materials.
Fig. 4 is a schematic connection diagram of a balancing weight and a rotating disc of the anti-clogging conveying pipe structure for pneumatic conveying of viscous materials.
Fig. 5 is a schematic structural diagram of a sealing group of the anti-clogging conveying pipe structure for pneumatic conveying of viscous materials.
Fig. 6 is a schematic structural diagram of a sealing buffer member of the anti-clogging conveying pipe structure for pneumatic conveying of viscous materials.
Reference numbers in the figures:
1-horizontal pipe, 2-longitudinal pipe, 3-bent pipe, 4-aluminum alloy outer pipe body, 5-rubber inner pipe body, 6-gap, 7-sealing ring and 8-controllable vibration blowing mechanism;
31-horizontal part, 32-longitudinal part, 33-first arc surface, 34-semispherical part and 35-second arc surface;
81-bending type by-pass pipe, 82-first air blowing pipe, 83-air source chamber, 84-pneumatic stop valve, 85-first pressure sensor, 86-first one-way valve and 87-vibration air blowing unit;
871-a second pressure sensor, 872-a second blowing pipe, 873-a vibration group, 874-a sealing group and 875-a second one-way valve;
8731-a vibration box, 8732-a rotating shaft, 8733-a rotating disc, 8734-a balancing weight, 8735-a base, 8736-a first spring, 8737-a second spring and 8738-a telescopic section;
8741-boss, 8742-through hole, 8743-seal bumper, 8744-nut, 8745-first projection, 8746-recess, 8747-second projection.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship, such as one based on the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit indicated must have a specific orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise specified and limited, terms such as "connected," "provided," "having," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or directly connected, and may be connected through an intermediate medium, so that those skilled in the art can understand the basic meaning of the above terms in the present invention according to specific situations.
Fig. 1 and fig. 2 show an embodiment of an anti-clogging conveying pipe structure for pneumatic conveying of viscous materials according to the present invention, which includes a horizontal pipe 1 and a longitudinal pipe 2 that are sequentially arranged at intervals, wherein an elbow 3 is arranged between the horizontal pipe 1 and the longitudinal pipe 2, the horizontal pipe 1, the longitudinal pipe 2 and the elbow 3 are integrally formed into a conveying pipe, the horizontal pipe 1, the longitudinal pipe 2 and the elbow 3 each include an outer aluminum alloy pipe 4 and an inner rubber pipe 5, a gap 6 is formed between the outer aluminum alloy pipe 4 and the inner rubber pipe 5, and the outer aluminum alloy pipe 4 and the inner rubber pipe 5 are connected by a plurality of sealing rings 7 that are distributed at equal intervals, and further include a controllable vibration blowing mechanism 8 that is arranged along an extending direction of the conveying pipe;
the elbow 3 comprises a horizontal part 31 communicated with the corresponding horizontal pipe 1 and a longitudinal part 32 communicated with the corresponding longitudinal pipe 2, a first arc surface 33 is smoothly transited between the horizontal part 31 and the inner side of the longitudinal part 32, a hemispherical part 34 is smoothly transited between the outer side of the horizontal part 31 and the outer side of the longitudinal part 32, and a second arc surface 35 is smoothly transited between the hemispherical part 34 and the outer side of the longitudinal part 32;
as shown in fig. 3, the controllable vibration blowing mechanism 8 includes a bending bypass pipe 81 and a control unit, the bending bypass pipe 81 is distributed along the extending direction of the horizontal pipe 1 and the longitudinal pipe 2, a plurality of first blowing pipes 82 are uniformly distributed between the bending bypass pipe 81 and the corresponding horizontal pipe 1 and longitudinal pipe 2, the first blowing pipes 80 are communicated with the inner rubber pipe body 5, one end of the bending bypass pipe 81 is connected with an air source chamber 83, one end of the bending bypass pipe 81 is provided with a pneumatic stop valve 84, the positions of the horizontal pipe 1 and the inner rubber pipe body 5 of the longitudinal pipe 2, which are close to the first blowing pipes 82, are provided with first pressure sensors 85, each first blowing pipe 82 is provided with a first one-way valve 86, the position of the bending bypass pipe 81, which is close to the bending, is provided with a vibration blowing unit 87, the vibration blowing unit 87 is communicated with the air source chamber 83, the vibration blowing unit 87 is connected with the bending pipe 3, the air outlet end of the vibration blowing unit 87 is aligned with the first arc surface 33 and the second arc surface 35 of the rubber inner pipe body 5 of the elbow pipe 3, and the control unit is electrically connected with the pneumatic stop valve 84, the first pressure sensor 85, the first one-way valve 86 and the vibration blowing unit 87.
The structure of the conveying pipe is improved, and the controllable vibration blowing mechanism 8 is arranged on the conveying pipe structure, so that the abrasion and the blockage of the straight pipe part and the bent pipe part are effectively avoided due to the fact that the two pipes are arranged together; the conveying pipe structure adopts a structural form that the rubber inner pipe body 5 and the aluminum alloy outer pipe body 4 are combined, the rubber inner pipe body 5 effectively reduces the impact force and the corrosivity of conveying materials due to the wear resistance and the corrosion resistance of the rubber inner pipe body, and the abrasion of the materials on the inner wall of the rubber inner pipe body is avoided.
The rubber inner pipe body 5 has a good buffering effect, and the blockage of the straight pipe of the rubber inner pipe body 5 can be solved under the buffering floating effect of the rubber inner pipe body 5 and the blowing effect of the controllable vibration blowing mechanism 8 on the horizontal pipe 1 and the longitudinal pipe 2 of the conveying pipe structure;
the elbow 3 adopts a special structural form, when the material directly impacts the elbow 3 from the horizontal pipe 1 or the longitudinal pipe 2, the material generates vortex at the hemispherical part 34 of the elbow 3 and flows upwards along with the second arc surface 35, so that a certain flow guiding effect is achieved, and the impact force of the material on the inner wall of the elbow 3 due to direction change and centrifugal force is relieved; although the material is relieved by the bent pipe 3 with a special structure in the application, the material still accumulates at the positions A and B in fig. 2, and the controllable vibration air blowing mechanism 8 performs double functions of air blowing or air blowing and vibration on the first circular arc surface 33 and the second circular arc surface 35, so that the material at the bent pipe 3 is blown away quickly.
In the present application, the controllable vibration blowing mechanisms 8 are disposed at the bent pipes 3, the number of the controllable vibration blowing mechanisms 8 is determined according to the number of the bent pipes 3 of the actual pneumatic conveying system, and only the structural schematic diagram of a single bent pipe 3 and the controllable vibration blowing mechanisms 8 is shown in fig. 1.
Further, the vibration air blowing unit 87 includes two second pressure sensors 871 disposed in the rubber inner tube 5 of the elbow 3 and two second air blowing tubes 872 connected to the elbow 3, the second pressure sensors 871 are respectively disposed at the side of the air outlet end of the second air blowing tubes 872, the two second air blowing tubes 872 are commonly connected to a vibration group 873, the air outlet end of the two second air blowing tubes 872 is connected to the rubber inner tube 5 in a buffer type sealing manner through a sealing group 874, the air outlet end of the two second air blowing tubes 872 respectively corresponds to the first arc surface 33 and the second arc surface 35, and the second air blowing tubes 872 are provided with a second check valve 875.
Further, the vibration group 873 includes a vibration box 8731 fixedly connected to two second blowing pipes 872 and a rotating shaft 8732 disposed to penetrate through the vibration box 8731, the rotating shaft 8732 is rotated by a motor, two ends of the rotating shaft 8732 are respectively connected to a rotating disc 8733, as shown in fig. 4, a weight block 8734 is eccentrically connected to the rotating disc 8733, a base 8735 disposed below the vibration box 8731 is further included, a first spring 8736 is disposed between the vibration box 8731 and the outer aluminum alloy pipe 4 of the elbow pipe 3, one end of each second blowing pipe 872 penetrates through the vibration box 8731, the base 8735 is communicated with an external air source chamber 83, a second spring 8737 is disposed between the base 8735 and the vibration box 8731, an expansion section 8738 is disposed on each second blowing pipe 872, and the expansion section 8738 is disposed at an upper side of the bending type bypass pipe 81.
In this application, the pivot 8732 is realized rotating (the motor is not shown in the figure) through outside motor, the pivot 8732 rotates and then drives the turntable 8733 to rotate, thereby the eccentric fixed balancing weight 8734 on the turntable 8733 is rotated, the vibration box 8731 floats up and down under the up-down rotation effect of the balancing weight 8734, the up-down floating process receives the cushioning effect of the first spring 8736 and the second spring 8737, and when the vibration box 8731 floats up, the second blow pipe 872 is driven to push up, because the second blow pipe 872 is fixedly connected with the inner rubber pipe 5, thereby the inner rubber pipe 5 floats up and down, thereby the material blocked at the elbow pipe is vibrated and dredged.
Wherein, the upper side of the vibration box 8731 is fixedly connected with the second blow pipe 872, while the lower side of the vibration box 8731 is non-fixedly connected with the expansion section 8738, when the vibration box 8731 floats up and down, the second blow pipe 872 expands and contracts along with the expansion section 8737.
Further, as shown in fig. 5, the sealing set 874 includes a shaft sleeve 8741 fixedly sleeved on one end of the second blowing pipe 872, the aluminum alloy outer body 4 and the rubber inner body 5 of the elbow 3 both have a through hole 8742 for inserting the shaft sleeve 8741, a sealing bumper 8743 is embedded in the through hole 8742 of the aluminum alloy outer body 4, the shaft sleeve 8741 is embedded in the sealing bumper 8743, both ends of the shaft sleeve 8741 protrude out of the sealing bumper 8743, the rubber inner body 5 is in threaded sealing connection with one end of the shaft sleeve 8741, the other end of the shaft sleeve 8741 is in threaded connection with a nut 8744, and the nut 8744 contacts with an end face of the sealing bumper 8743.
Further, as shown in fig. 6, the sealing bumper 8743 includes a first protrusion 8745, a recess 8746 and a second protrusion 8747, the first protrusion 8745 is disposed between the aluminum alloy outer tube 4 and the rubber inner tube 5, the recess 8746 is engaged with the inner wall of the through hole 8742 of the aluminum alloy outer tube 4, and the second protrusion 8747 is disposed at the outer end of the aluminum alloy outer tube 4.
In this application, 8743 both realized in the sealed buffering between second gas blow pipe 872 and the rubber in the gas tightness between the body 5 be connected, played the cushioning effect of certain degree to the upper and lower vibration of second gas blow pipe 872 again, improved vibration stationarity, also made simultaneously about the vibration stroke spacing in the certain distance, 8743 realizes the block with aluminum alloy outer tube 4 between the sealed buffering, connection stability is high.
An anti-blocking method for an anti-blocking conveying pipe structure for pneumatic conveying of viscous materials comprises the following specific steps:
s1, the first pressure sensors 85 detect the pressure value of the rubber inner pipe body 5 in the horizontal pipe 1 or the longitudinal pipe 2 in real time, the detected pressure value is transmitted to the control unit, the control unit receives signals, analyzes and processes the signals, and compares the pressure values detected by the first pressure sensors 85 with a preset value set in the control unit;
a. if the pressure values detected by the plurality of first pressure sensors 85 are all less than the predetermined value, the control unit sends out a command message of not opening to the first check valve 86 and the pneumatic stop valve 84;
b. if the pressure value detected by any one of the first pressure sensors 85 is greater than or equal to a predetermined value, which indicates that the position of the rubber inner pipe body 5 in the horizontal pipe 1 or the longitudinal pipe 2 starts to be blocked, the control unit sends out opening instruction information to the first check valve 86 and the pneumatic stop valve 84 on the first blowing pipe 82 close to the blocked position, and the air source chamber 83 blows air into the rubber inner pipe body 5 to blow the blocked material to the first blowing pipe 82;
s2, the second pressure sensors 871 monitor the pressure value of the rubber inner pipe body 5 in the elbow 3 in real time, the detected pressure value is transmitted to the control unit, the control unit receives signals, analyzes and processes the signals, compares the pressure values detected by the two second pressure sensors 871 with a lower threshold value and an upper threshold value set in the control unit, the numerical value of the upper threshold value is larger than that of the lower threshold value, and the larger the numerical value of the threshold value is, the larger the blockage of the rubber inner pipe body 5 in the elbow is represented;
a. if the pressure values detected by the two second pressure sensors 871 are both smaller than or equal to the lower threshold value, the control unit sends out non-opening instruction information to the pneumatic stop valve 84, the two second one-way valves 875 and the motor driving the rotating shaft 8732 to rotate;
b. if the pressure value with the larger value among the pressure values detected by the two second pressure sensors 871 is between the upper threshold value and the lower threshold value set in the control unit, the control unit sends opening instruction information to the pneumatic stop valve 84 and the two second one-way valves 875 and sends non-opening instruction information to a motor driving the rotating shaft 8732 to rotate, and the air source chamber 83 simultaneously blows air to the two second air blowing pipes 872 into the rubber inner pipe body 5 of the elbow pipe 3, so that the blocked materials are blown away;
c. if the pressure value with the larger value among the pressure values detected by the two second pressure sensors 871 is greater than or equal to the upper threshold value, the control unit sends opening instruction information to the pneumatic stop valve 84, the two second one-way valves 875 and the motor driving the rotating shaft 8732 to rotate, so that the air source chamber 83 can vibrate the inner rubber pipe 5 in the elbow pipe 3 while blowing air to the inner rubber pipe 5 through the second air blowing pipe 872, and the blocked materials can be rapidly dredged under the bidirectional actions of vibration and air blowing.
According to the invention, the controllable vibration blowing mechanism 8 is arranged, so that controllable automatic blockage removal can be realized aiming at different blockage situations, different blockage prevention methods are adopted for different pressure values of the straight pipe part and the bent pipe part, especially aiming at the bent pipe 3, the blockage prevention effect is obvious, and the structural strength of the conveying pipe structure can not be damaged.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides an anti-clogging conveying pipe structure that stickness material air conveying used which characterized in that: the device comprises a horizontal pipe (1) and a longitudinal pipe (2) which are sequentially arranged at intervals, wherein a bent pipe (3) is arranged between the horizontal pipe (1) and the longitudinal pipe (2), the horizontal pipe (1), the longitudinal pipe (2) and the bent pipe (3) form a conveying pipe in an integrated mode, the horizontal pipe (1), the longitudinal pipe (2) and the bent pipe (3) respectively comprise an aluminum alloy outer pipe body (4) and a rubber inner pipe body (5), a gap (6) is formed between the aluminum alloy outer pipe body (4) and the rubber inner pipe body (5), the aluminum alloy outer pipe body (4) and the rubber inner pipe body (5) are connected through a plurality of sealing rings (7) which are distributed at equal intervals, and the device further comprises a controllable vibration blowing mechanism (8) arranged along the extension direction of the conveying pipe;
the elbow (3) comprises a horizontal part (31) communicated with the corresponding horizontal pipe (1) and a longitudinal part (32) communicated with the corresponding longitudinal pipe (2), a first arc surface (33) is smoothly transited between the horizontal part (31) and the inner side of the longitudinal part (32), a hemispherical part (34) is smoothly transited between the outer side of the horizontal part (31) and the outer side of the longitudinal part (32), and a second arc surface (35) is smoothly transited between the hemispherical part (34) and the outer side of the longitudinal part (32);
the controllable vibration air blowing mechanism (8) comprises a bending type bypass pipe (81) and a control unit, the bending type bypass pipe (81) is distributed along the extending direction of a horizontal pipe (1) and a longitudinal pipe (2), a plurality of first air blowing pipes (82) which are uniformly distributed are arranged between the bending type bypass pipe (81) and the corresponding horizontal pipe (1) and the longitudinal pipe (2), the first air blowing pipes (80) are communicated with an inner rubber pipe body (5), one end of the bending type bypass pipe (81) is connected with an air source chamber (83), one end of the bending type bypass pipe (81) is provided with a pneumatic stop valve (84), the positions of the inner rubber pipe body (5) of the horizontal pipe (1) and the longitudinal pipe (2) close to the first air blowing pipes (82) are provided with a first pressure sensor (85), and each first air blowing pipe (82) is provided with a first one-way valve (86), the bending type bypass pipe (81) is provided with a vibration blowing unit (87) close to the bending position, the vibration blowing unit (87) is communicated with an air source chamber (83), the vibration blowing unit (87) is connected with the bent pipe (3), the air outlet end of the vibration blowing unit (87) is aligned to a first arc surface (33) and a second arc surface (35) of the rubber inner pipe body (5) of the bent pipe (3), and the control unit is electrically connected with the pneumatic stop valve (84), the first pressure sensor (85), the first one-way valve (86) and the vibration blowing unit (87).
2. The anti-clogging conveying pipe structure for pneumatic conveying of viscous materials, according to claim 1, is characterized in that: the vibration blowing unit (87) comprises two second pressure sensors (871) arranged in a rubber inner pipe body (5) of the elbow pipe (3) and two second blowing pipes (872) connected with the elbow pipe (3), wherein the second pressure sensors (871) are respectively and correspondingly arranged at the side of the air outlet end of the second blowing pipes (872), the two second blowing pipes (872) are jointly connected with a vibration group (873), the air outlet ends of the two second blowing pipes (872) are in buffer type sealing connection with the rubber inner pipe body (5) through a sealing group (874), the air outlet ends of the two second blowing pipes (872) respectively correspond to the first arc surface (33) and the second arc surface (35), and the second blowing pipes (872) are provided with second one-way valves (875).
3. The anti-clogging conveying pipe structure for pneumatic conveying of viscous materials, according to claim 2, is characterized in that: the vibration group (873) comprises a vibration box (8731) fixedly connected with the two second blow pipes (872) and a rotating shaft (8732) arranged through the vibration box (8731), the rotating shaft (8732) is rotated by a motor, two ends of the rotating shaft (8732) are respectively connected with a rotating disc (8733), the turntable (8733) is eccentrically connected with a balancing weight (8734) and also comprises a base (8735) arranged below the vibration box (8731), a first spring (8736) is arranged between the vibration box (8731) and the aluminum alloy outer pipe body (4) of the elbow pipe (3), one end of the second blowing pipe (872) penetrates through the vibration box (8731) and the base (8735) to be communicated with an external air source chamber (83), a second spring (8737) is arranged between the base (8735) and the vibration box (8731), the second blow pipe (872) is provided with an expansion section (8738), and the expansion section (8738) is positioned at the upper side of the bending type bypass pipe (81).
4. The anti-clogging conveying pipe structure for pneumatic conveying of viscous materials, according to claim 3, is characterized in that: the sealing group (874) comprises a shaft sleeve (8741) fixedly sleeved on one end of the second blowing pipe (872), through holes (8742) for accommodating the shaft sleeve (8741) to be embedded are formed in the aluminum alloy outer pipe body (4) and the rubber inner pipe body (5) of the elbow pipe (3), a sealing buffer piece (8743) is embedded in the through hole (8742) of the aluminum alloy outer pipe body (4), the shaft sleeve (8741) is embedded in the sealing buffer piece (8743), two ends of the shaft sleeve (8741) protrude out of the sealing buffer piece (8743), the rubber inner pipe body (5) is in threaded sealing connection with one end of the shaft sleeve (8741), a nut (8744) is in threaded connection with the other end of the shaft sleeve (8741), and the nut (8744) is in contact with the end face of the sealing buffer piece (8743).
5. The anti-clogging conveying pipe structure for pneumatic conveying of viscous materials, according to claim 4, is characterized in that: the sealing buffer piece (8743) comprises a first protruding portion (8745), a recessed portion (8746) and a second protruding portion (8747), the first protruding portion (8745) is arranged between the aluminum alloy outer tube (4) and the rubber inner tube (5), the recessed portion (8746) is embedded with the inner wall of the through hole (8742) of the aluminum alloy outer tube (4), and the second protruding portion (8747) is arranged at the outer side end of the aluminum alloy outer tube (4).
6. An anti-clogging method using the anti-clogging conveying pipe structure for pneumatic conveying of viscous materials according to any one of claims 3 to 5, characterized in that: the method comprises the following specific steps:
s1, the first pressure sensors (85) detect the pressure value of the rubber inner pipe body (5) in the horizontal pipe (1) or the longitudinal pipe (2) in real time, the detected pressure value is transmitted to the control unit, the control unit receives signals, analyzes and processes the signals, and compares the pressure values detected by the first pressure sensors (85) with a preset value set inside the control unit;
a. if the pressure values detected by the plurality of first pressure sensors (85) are all smaller than a preset value, the control unit sends out non-opening instruction information to the first check valve (86) and the pneumatic stop valve (84);
b. if the pressure value detected by any one of the first pressure sensors (85) is larger than or equal to a preset value, the pressure value indicates that the position of the inner rubber pipe body (5) in the horizontal pipe (1) or the longitudinal pipe (2) starts to be blocked, the control unit sends out opening instruction information to a first one-way valve (86) on a first air blowing pipe (82) close to the blocked position and a pneumatic stop valve (84), and an air source chamber (83) blows air into the inner rubber pipe body (5) to the first air blowing pipe (82), so that the blocked materials are blown;
s2, the second pressure sensors (871) monitor the pressure value of the rubber inner tube body (5) in the elbow (3) in real time, the detected pressure value is transmitted to the control unit, the control unit receives signals, analyzes and processes the signals, and compares the pressure values detected by the two second pressure sensors (871) with a lower threshold value and an upper threshold value set in the control unit, wherein the value of the upper threshold value is larger than that of the lower threshold value, and the larger the value of the threshold value is, the larger the blockage of the rubber inner tube body (5) in the elbow is;
a. if the pressure values detected by the two second pressure sensors (871) are less than or equal to the lower threshold value, the control unit sends out non-opening instruction information to the pneumatic stop valve (84), the two second one-way valves (875) and the motor driving the rotating shaft (8732) to rotate;
b. if the pressure value with the larger value among the pressure values detected by the two second pressure sensors (871) is between the upper threshold value and the lower threshold value set in the control unit, the control unit sends opening instruction information to the pneumatic stop valve (84) and the two second one-way valves (875) and sends non-opening instruction information to a motor driving the rotating shaft (8732) to rotate, and the air source chamber (83) simultaneously blows air to the two second air blowing pipes (872) into the rubber inner pipe body (5) of the elbow pipe (3), so that the blocked materials are blown away;
c. if the pressure value with the larger value among the pressure values detected by the two second pressure sensors (871) is greater than or equal to the upper threshold value, the control unit sends opening instruction information to the pneumatic stop valve (84), the two second one-way valves (875) and the motor driving the rotating shaft (8732) to rotate, so that the air source chamber (83) blows air to the second air blowing pipe (872) to the rubber inner pipe body (5), the rubber inner pipe body (5) in the elbow pipe (3) is vibrated, and the blocked material is rapidly dredged under the two-way effects of vibration and blowing.
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| CN202011158993.7A CN112340463B (en) | 2020-10-27 | 2020-10-27 | Anti-blocking conveying pipe structure for pneumatic conveying of viscous materials and anti-blocking method thereof |
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